This handheld metal detector is an ideal tool when security inspection is needed. It can detect metal objects with high sensitivity. The metal detector is lightweight and easy to operate. When an object is detected, the detector will produce a sound and a red LED light will turn on. The sensitivity of the device can be adjusted to meet the respective requirements. The detector is powered by a 9 V battery (not included). Note: The use of a metal detector might require permission, a permit or a license. The location where a metal detector can be used might also be restricted. Familiarise yourself with all local, state, and national laws related to metal detecting. Follow these laws.